<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>按奇偶排序数组</title>
</head>
<body>
  <script>
    function fn(nums) {
      let index = 0
      const res = []
      for (const num of nums) {
        if (num % 2 === 0) {
          res[index++] = num
        }
      }
      for (const num of nums) {
        if (num % 2 !== 0) {
          res[index++] = num
        }
      }
      return res
    }
    console.log(fn([3, 1, 2, 4]))
  </script>
</body>
</html>